Improvement in scale-borers for steam-boilers



i. H @man ETERS. PNOTO-LITHOGRAP ER. WAS INGTON. D` CA UNITED STATES PATENT OFFICE.

CHARLES H. KEENER, OF THE UNITED STATES NAVY.

Specification forming part of Letters' Patent No. 49,1116, dated August 15, 1865.

To all whom it may concern.-

Be it known that I, CHARLES H. KEENER, ofthe United States Navy, have invented a new and Improved Scale-Botter; and Ido hereby declare that the following,r is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 represents a lsectional front elevation of this invention. Fig. 2 is a sectional side elevation of the same.

Similar letters of reference indicate like parts.

This invention relates to a tool intended to remove the scale from the interior of boilertubes, and particularly from tubes in what is known as thc Martin boiler.

In order to be able to introduce the tool into the boiler, it must be so arranged that it can be taken apart and its parts passed through the man-hole, and that the same, after having all been passed into the boiler, can be put. up in the limited space which is afforded forthis purpose, and which in Martin boilers,sueh as atein general use in the United States Navy, does not generallyexceed thirty inches in height.

My tool consists of a bed-plate, A, to which is bolted b v means of a screw, a, the standard B, and this standard is provided with a journal-bomb, on its top to form the. bearing for the driviugshaft C, and with two boxes, c c, on its side, which forni the bearings for the hub D of a bevel-wheel, E, as shown particularly in Fig. 2 of the drawings. The bevelwbrel E gears into another wheel, F, mounted on the end of thedriving-shaft, and it is bored out to receive the bore-spindle G. This spindle connects with the wheel and its hub by means of a featherkey tting into a groove, d, so that it is compelled to rotate with the same and still allowed to slide through it in a longitudinal direction.

Secured to the lower end of the bore-spindle is the cutter-head H, which is furnished with two or more adjustable cutters, f, that serve to remove the scale from the interior of the tubes. To avoid injury to the tubes the cutters must be adjusted to bore somewhat smaller than the bore of the tube, and the scale which may still remain adhering to the tube can be removed shown in Fig. 2, andone of the jaws of said clamp is movable, sothat the same can be readily attached to or detached from the handlever. After the spindle has been fed down as far as its length will permit it is clamped in the hub D by means of a suitable set-screw, and another length, Gt, is added to it. This additional length is provided with a screw at its lower end to screw into a corresponding socket in the upper end of the spindle G, and the upper end of said additional length is furnished with a circular' groove, hi, so that the clamp K can be conveniently connected to it. By these means the cuttercan be fed through the entire length of the tube.

Ifdesired, an ordinary feed-screw may be used instead of the hand-lever l.

The crank L, which serves to impait motion to the driving-shaft, is slotted, so that its han dle can be moved closer to or farther from the center of rotation, according to the power re; quired.

The bed-plate A is `dotted and provided with suitable clamping-screws, by means ot' which it can be. secured to the tube-sheet.

By this tool the opt-ration of scaling boilertubes is rendered easy, and the tubes are not liable to be injured.

Having thus describedany invention, 1 claim as new and desire to secure by Letters Patent- The combination and arrangement ofthe bed-plate A, spindle G, cutter-head H, auxiliary spindle G2, hand-lever I, Clamp K, and standard J, substantially upon the principle and in the manner as herein set forth.

CHARLES E. KEENEE.

Witnesses THOMAS HARRISON, Trios. HANNIGAN. 

